Finding the Third Proportional to 148,846.50 and 320,157

Step by Step Solution

1. Step 1: Write the proportion equation
   148,846.50 : 320,157 = 320,157 : x
2. Step 2: Convert to fraction form
   148,846.50/320,157 = 320,157/x
3. Step 3: Cross multiply
   148,846.50x = 320,157 × 320,157
4. Step 4: Simplify right side
   148,846.50x = 102,500,504,649
5. Step 5: Solve for x
   x = 102,500,504,649/148,846.50
6. Step 6: Final answer
   x = 688,632.28